The nurse is reviewing home medications for a client with a history of Major Depressive Disorder who has been taking sertraline for one year. The client states, “I did research and started taking St. John’s Wort to help with my depression in conjunction with sertraline.” Which of the following should the nurse observe for in the client?

Choice A reason: St. John’s Wort with sertraline increases serotonin levels, risking serotonin syndrome. Symptoms like diaphoresis, tachycardia, and tremors are classic signs, requiring urgent monitoring, making this the correct observation for the client. Choice B reason: Fever, dystonia, and muscle rigidity suggest neuroleptic malignant syndrome, linked to antipsychotics, not sertraline or St. John’s Wort. This is unrelated to the drug interaction, making it incorrect. Choice C reason: Worsening depression or suicidal ideation may occur with antidepressants, but St. John’s Wort more likely causes serotonin syndrome. These symptoms are less immediate, making this incorrect for the primary concern. Choice D reason: Spasms and bizarre movements suggest tardive dyskinesia, associated with antipsychotics, not sertraline or St. John’s Wort. Serotonin syndrome is the primary risk, making this incorrect.